摘要:
A process for producing a polyurethane product comprises steps of (a) supplying at least one polyisocyanate (b) supplying at least one polyol composition comprising at least about 5 weight percent based on total weight of polyols of at least one natural oil based polyol (b1) having a hydroxyl number of at most about 300 and a viscosity below about 10000 mPa·os; and (c) exposing the polyisocyanate and the polyol composition to reaction conditions such that urethane bonds are formed, wherein reaction conditions include the presence of at least one bismuth catalyst. Use of bismuth catalysts is particularly applicable to preparation of open celled, flexible polyurethane foams using polyols made from renewable resources, optionally with other polyols. The invention includes foams made by the process, including viscoelastic foams, preferably having a velvet feel.
摘要:
The present inventions disclosed copolymer polyol composition which have a polymer content of 40 to 75 weight percent, based on total weight, and product stability such that essentially 100 percent passes through a 150 mesh screen produced by a free radical polymerization of the composition comprising: (a) a feedstock polyol; (b) at least one ethylenically unsaturated monomer; (c) a free radical polymerization initiator; (d) a chain transfer agent; (e) optionally a preformed stabilizer; and (f) optionally a macromer; with the proviso that at least one of e) or f) is present; wherein the feedstock has a nominal average functionality of 1.5 to 2.7, an equivalent weight of 400 to 2000. Such copolymer polyols can be used for the production of polyurethane products.
摘要:
Described is a polyol blend for use in the production of polyurethane products. The polyol blend may include between about 50 and about 99 percent by weight of the polyol blend of at least one HPPO polyether polyol compound having a nominal starter functionality between about 2 and about 8 and a hydroxyl number between about 20 and about 800, and between about 1 and about 50 percent by weight of the polyol blend of at least one autocatalytic polyol.
摘要:
A natural oil based polyol blend is provided. The blend includes a first natural oil based polyol comprising is the reaction product of a first monomer and a first initiator, and where the first monomer is derived from at least one first fatty acid methyl ester. The blend also includes a second natural oil based polyol comprising the reaction product of a second monomer and a second initiator. The second monomer is derived from at least one second fatty acid methyl ester, and at least one of the second monomer and the second initiator is different from the first monomer and the first initiator, respectively. The natural oil based polyol blend may be reacted with an isocyanate to form a foam.
摘要:
A high resilience (HR) polyurethane foam comprising the reaction product of (1) at least one polyisocyanate comprising at least about 5 weight percent of at least one methylene diphenyl diisocyanate isomer, derivative or a combination thereof and (2) an admixture of at least one natural oil based polyol and at least one additional polyol which is not a natural oil based polyol, wherein the admixture comprises at least about 10 weight percent natural oil based polyol and at least about 40 weight percent additional polyol having an equivalent weight of at least about 1700 Daltons; and the foam has a resiliency indicated by a ball rebound of at least 40 percent as measured according to the procedures of ASTM D 3574, Test H.
摘要翻译:高弹性(HR)聚氨酯泡沫,其包含(1)至少一种包含至少约5重量%的至少一种亚甲基二苯基二异氰酸酯异构体,衍生物或其组合的至少一种多异氰酸酯的反应产物和(2)至少 一种天然油基多元醇和至少一种不是天然油基多元醇的另外的多元醇,其中所述混合物包含至少约10重量%的天然油基多元醇和至少约40重量%的额外的多元醇,其当量重量至少为 约1700道尔顿; 并且根据ASTM D 3574测试H的程序,泡沫具有由至少40%的球回弹所示的弹性。
摘要:
A high resilience (HR) polyurethane foam comprising the reaction product of (1) at least one polyisocyanate comprising at least about 5 weight percent of at least one methylene diphenyl diisocyanate isomer, derivative or a combination thereof and (2) an admixture of at least one natural oil based polyol and at least one additional polyol which is not a natural oil based polyol, wherein the admixture comprises at least about 10 weight percent natural oil based polyol and at least about 40 weight percent additional polyol having an equivalent weight of at least about 1700 Daltons; and the foam has a resiliency indicated by a ball rebound of at least 40 percent as measured according to the procedures of ASTM D 3574, Test H. An HR foam is made according to a process comprising steps of (a) forming a natural oil based polyol composition comprising at least about 10 weight percent of at least one natural oil based polyol having an OH functionality of at least about 2.2 and an equivalent weight of at least about 500 Dalton (Da) and at least about 40 weight percent of at least one conventional polyol having an equivalent weight of at least about 1700 Da and water; (b) admixing at least one catalyst with the natural oil based polyol composition to form a catalyst polyol admixture; (c) supplying a poly isocyanate comprising at least about 5 weight percent of at least one methylene diphenyl diisocyanate isomer, derivative or combination thereof in an amount corresponding to an isocyanate index of at least about 55 and at most about 105 and (c) admixing the isocyanate with the catalyst polyol admixture. The foams are useful in such applications as comfort, sound absorption including noise dampening, harshness dampening, protection, packaging, medical equipment, safety equipment and combinations thereof.
摘要:
The present invention pertains to natural oil based polyols having intrinsic surfactancy and to their use in the production of flexible, viscoelastic and/or semi-rigid, one-shot polyurethane foams with reduced VOC (Volatile Organic Compound) emission.
摘要:
The present invention discloses a process for producing a polyurethane product with autocatalytic polyols. These auto-catalytic polyols are based on an initiator of the formula (I): HmA-(CH2)n—N(R)—(CH2)p-AHm where n and p are independently integers from 2 to 6, A at each occurrence is independently oxygen, nitrogen or hydrogen, with the proviso that only one of A can be hydrogen at one time, R is a C1 to C3 alkyl group, m is equal to 0 when A is hydrogen, is 1 when A B is oxygen and is 2 when A is nitrogen; or are polyols which contain an alkyl amine of within the polyol chain or a dialkylylamino group pendant to the polyol chain wherein the polyol chain is obtained by copolymerization of at least one monomer containing an alkyl aziridine or N,N-dialkyl glycidylamine with at least one alkylene oxide. These auto-catalytic polyols are reacted with a polyisocyanate in the presence of other additives and/or auxiliary agents known per se to produce polyurethane products.
摘要:
The present invention pertains to polyols having autocatalytic properties in urethane formation. Such polyols are prepared by end-capping polyols with a tertiary amine. The invention also discloses the process for producing such polyols an their use in production of polyurethane products.
摘要:
The present invention discloses a process for producing a polyurethane product with autocatalytic polyols. These autocatalytic polyols are based on an initiator that contains a tertiary amine. These autocatalytic polyols are reacted with a polyisocyanate in the presence of other additives and/or auxiliary agents known per se to produce polyurethane products.